kubota b7001 hydraulic fault ?

hi , my kubota has developed a fault i have only owned it for a month , any way i had just fitted a rotovator ,to work on my field here in ireland when after about an hour the hydraulics started to play up.
it started with when i raised the rotovator i would raise slow intermittenly, then it would take an age to lower again in short movements, i have checked the hydraulics level which is just on the tip of the dipstick , also does anyone know where i could get a workshop manual and parts manual for a b7001
thanks john

j.kelly
April 2007